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NON-WHOLLY OWNED SUBSIDIARIES - Summarized Cash Flow Activities (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of subsidiaries [line items]      
Cash flow activities, operating $ 4,653 $ 4,078 $ 3,131
Cash flow activities, investing (6,901) (12,990) (3,365)
Cash from financing activities 2,612 9,419 56
U.K. regulated distribution operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 282 226 293
Cash flow activities, investing (439) (487) (432)
Cash from financing activities 113 309 101
Brazilian regulated gas transmission operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 585 739 783
Cash flow activities, investing (178) (36) (80)
Cash from financing activities (158) (742) (824)
Colombian natural gas distribution operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 93 89 154
Cash flow activities, investing (39) (38) (32)
Cash from financing activities (49) (78) (99)
Brazil electricity transmission operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 29 23 90
Cash flow activities, investing 25 37 (58)
Cash from financing activities (23) (51) (120)
North American residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 128 33 (116)
Cash flow activities, investing (160) (2,647) (352)
Cash from financing activities 70 2,671 480
Indian gas transmission operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 196 134 132
Cash flow activities, investing (170) 86 5
Cash from financing activities 28 (122) (123)
European residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 140 (3) (25)
Cash flow activities, investing (168) (2,365) (35)
Cash from financing activities 30 2,489 71
North American rail operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 526 528 515
Cash flow activities, investing (422) (296) (250)
Cash from financing activities (95) (259) (210)
U.K. port operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 54 16 31
Cash flow activities, investing (42) (51) (61)
Cash from financing activities 2 25 42
Australian port operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 17 6 26
Cash flow activities, investing 59 226 (44)
Cash from financing activities (72) (229) (3)
Global intermodal logistics operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 1,133 327  
Cash flow activities, investing (600) (3,048)  
Cash from financing activities (532) 2,828  
Canadian diversified midstream operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 504 542 568
Cash flow activities, investing (562) (285) (713)
Cash from financing activities (81) (95) 144
North American gas storage operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 313 219 61
Cash flow activities, investing (60) 56 (37)
Cash from financing activities (191) (228) (26)
Canadian natural gas gathering and processing operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 211 170 197
Cash flow activities, investing (172) (164) (68)
Cash from financing activities (16) (12) (153)
U.S. colocation data center operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 256 (13) (5)
Cash flow activities, investing (1,547) (85) (300)
Cash from financing activities 1,451 93 318
Australian data center operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating (8) 5 5
Cash flow activities, investing (106) (72) (131)
Cash from financing activities 110 69 114
Indian telecom tower operation      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating 465 608 315
Cash flow activities, investing (1,744) (767) (243)
Cash from financing activities 1,261 255 (28)
European hyperscale data center platform      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating (11) 54  
Cash flow activities, investing (697) (2,993)  
Cash from financing activities 794 2,993  
Holding LP and other      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating (380) 269 (132)
Cash flow activities, investing 174 (629) (310)
Cash from financing activities $ 202 $ 152 362
Indian toll roads      
Disclosure of subsidiaries [line items]      
Cash flow activities, operating     51
Cash flow activities, investing     (15)
Cash from financing activities     $ (26)